The Application Of Nanodiamonds in The Field Of Abrasives And Grinding Tools

What is nanodiamond?

Nanodiamonds are a type of non-metallic material composed of sp ³ hybridized carbon atoms, which have characteristics such as superhard, high thermal conductivity, and biocompatibility. They can be prepared by various processes such as high-temperature and high-pressure methods, detonation methods, etc. Its structure exhibits core-shell characteristics (sp ³ core and sp ² amorphous carbon shell), with sizes typically ranging from 1-100 nanometers.

This material is widely used in industrial and technological fields: as a metal coating additive, it can increase the lifespan of parts by 1-9 times and reduce coating thickness by more than 50%; Significant improvement in propane dehydrogenation selectivity and oxygen reduction reaction stability through heteroatom modification in the field of catalysis; As a lubricant additive, it reduces friction loss by 30-40%. Used in the aerospace field for turbine blade coatings and composite reinforcement agents to enhance component wear resistance and fatigue resistance. In the medical field, it is used as a drug carrier and fluorescent probe for tumor targeted therapy and in vivo imaging.

Research has found that material properties can be optimized by regulating the sp ³/sp ² hybridization ratio: boron, nitrogen, and phosphorus doped modified nanodiamonds outperform traditional metal catalysts in catalytic reactions; The mixed hybrid structure formed during the phase transition process leads to anomalous non monotonic changes in thermal conductivity. The development of composite materials further expands their application boundaries, such as amorphous carbon/nanodiamond composite materials that combine 53GPa hardness and graphite level conductivity

 

The application of nanodiamonds in the field of abrasives and grinding tools

Nano diamond is mainly used in the field of abrasives and grinding tools to mix with transition metals to manufacture high-strength, low porosity diamond sintered bodies, with a microhardness of up to 6000-7000kg/mm2. Can be used to process soft or brittle materials, with very low surface roughness. If carbon is pre epitaxially grown or diamond micro powder synthesized by static pressure is added, the microhardness of diamond polycrystalline obtained by sintering at a pressure of 10-12 GPa can reach the level of natural diamond single crystals. The use of drill bits to drill high-strength rock formations can achieve or exceed the performance of CB - СП (Russian) polycrystalline materials. When using nano diamond as a component of silicon impregnating material to compress diamond micro powder synthesized by static pressure, the yield of sintered body can be almost doubled, and the compressive strength can be increased from 1.7 GPa to 2.2 GPa. This sintered body can be used as a cutting element for drill bits.